u nails U nail gauge:BWG6-14 1. Material:Iron 2. Surface:bright,E.G.,H.D.G.as you like Shank: smooth U-type Iron NailsMaterialIronLength20mm to 125mmShank Diameter2mm to 5mmSurface treatmentBright(Polished), E.G.(Electro-Galvanized), H.D.G.(Hot Dipped Galvanized)Usagemainly used for fixing metal plate net, wire mesh and indoor external line, and can be used for fixing wooden steel ...